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sega/segafruit.cpp: preliminary decryption for m5001

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This commit is contained in:
Ivan Vangelista 2023-04-18 18:09:57 +02:00
parent 5e779667e6
commit 079d6e7cb1
1 changed files with 45 additions and 46 deletions
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91
src/mame/sega/segafruit.cpp
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@ -11,8 +11,7 @@
8-dip bank
TODO:
m300x and m400x: decryption needs to be verified (may be good), then everything else
m5001: everything
decryption needs to be verified (may be good), then everything else
************************************************************************************************************/
@ -46,22 +45,22 @@ public:
{
}
void segafruit(machine_config &config);
void segafruit(machine_config &config) ATTR_COLD;
void decrypt_m3001();
void decrypt_m4001();
void decrypt_m5001();
void decrypt_m3001() ATTR_COLD;
void decrypt_m4001() ATTR_COLD;
void decrypt_m5001() ATTR_COLD;
protected:
virtual void machine_start() override;
virtual void machine_start() override ATTR_COLD;
private:
void mem_map(address_map &map);
void io_map(address_map &map);
void opcodes_map(address_map &map);
void pcm_map(address_map &map);
void sound_mem_map(address_map &map);
void sound_io_map(address_map &map);
void mem_map(address_map &map) ATTR_COLD;
void io_map(address_map &map) ATTR_COLD;
void opcodes_map(address_map &map) ATTR_COLD;
void pcm_map(address_map &map) ATTR_COLD;
void sound_mem_map(address_map &map) ATTR_COLD;
void sound_io_map(address_map &map) ATTR_COLD;
required_device<z80_device> m_maincpu;
required_device<z80_device> m_soundcpu;
@ -236,7 +235,7 @@ void segafruit_state::decrypt_m4001()
}
}
void segafruit_state::decrypt_m5001() // TODO
void segafruit_state::decrypt_m5001()
{
uint8_t *rom = memregion("maincpu")->base();
@ -244,22 +243,22 @@ void segafruit_state::decrypt_m5001() // TODO
{
switch (i & 0x1111)
{
case 0x0000: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x0001: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x0010: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x0011: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x0100: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x0101: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x0110: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x0111: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x1000: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x1001: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x1010: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x1011: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x1100: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x1101: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x1110: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x1111: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x0000: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x20, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x0001: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x20, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x0010: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x88, 5, 6, 3, 4, 7, 2, 1, 0); break;
case 0x0011: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0xa0, 5, 6, 7, 4, 3, 2, 1, 0); break;
case 0x0100: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x20, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x0101: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0xa0, 5, 6, 7, 4, 3, 2, 1, 0); break;
case 0x0110: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x88, 7, 6, 3, 4, 5, 2, 1, 0); break;
case 0x0111: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0xa0, 5, 6, 7, 4, 3, 2, 1, 0); break;
case 0x1000: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x08, 3, 6, 5, 4, 7, 2, 1, 0); break;
case 0x1001: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x88, 3, 6, 7, 4, 5, 2, 1, 0); break;
case 0x1010: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x88, 3, 6, 7, 4, 5, 2, 1, 0); break;
case 0x1011: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x88, 7, 6, 3, 4, 5, 2, 1, 0); break;
case 0x1100: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x08, 3, 6, 5, 4, 7, 2, 1, 0); break;
case 0x1101: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0xa0, 5, 6, 7, 4, 3, 2, 1, 0); break;
case 0x1110: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0x08, 3, 6, 5, 4, 7, 2, 1, 0); break;
case 0x1111: m_decrypted_opcodes[i] = bitswap<8>(rom[i] ^ 0xa0, 5, 6, 7, 4, 3, 2, 1, 0); break;
}
}
@ -267,22 +266,22 @@ void segafruit_state::decrypt_m5001() // TODO
{
switch (i & 0x1111)
{
case 0x0000: rom[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x0001: rom[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x0010: rom[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x0011: rom[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x0100: rom[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x0101: rom[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x0110: rom[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x0111: rom[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x1000: rom[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x1001: rom[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x1010: rom[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x1011: rom[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x1100: rom[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x1101: rom[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x1110: rom[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x1111: rom[i] = bitswap<8>(rom[i] ^ 0x00, 7, 6, 5, 4, 3, 2, 1, 0); break;
case 0x0000: rom[i] = bitswap<8>(rom[i] ^ 0x08, 3, 6, 5, 4, 7, 2, 1, 0); break;
case 0x0001: rom[i] = bitswap<8>(rom[i] ^ 0xa0, 5, 6, 7, 4, 3, 2, 1, 0); break;
case 0x0010: rom[i] = bitswap<8>(rom[i] ^ 0x88, 7, 6, 3, 4, 5, 2, 1, 0); break;
case 0x0011: rom[i] = bitswap<8>(rom[i] ^ 0x88, 7, 6, 3, 4, 5, 2, 1, 0); break;
case 0x0100: rom[i] = bitswap<8>(rom[i] ^ 0x88, 5, 6, 7, 4, 3, 2, 1, 0); break;
case 0x0101: rom[i] = bitswap<8>(rom[i] ^ 0xa0, 5, 6, 7, 4, 3, 2, 1, 0); break;
case 0x0110: rom[i] = bitswap<8>(rom[i] ^ 0x88, 5, 6, 3, 4, 7, 2, 1, 0); break;
case 0x0111: rom[i] = bitswap<8>(rom[i] ^ 0x88, 5, 6, 3, 4, 7, 2, 1, 0); break;
case 0x1000: rom[i] = bitswap<8>(rom[i] ^ 0x08, 3, 6, 5, 4, 7, 2, 1, 0); break;
case 0x1001: rom[i] = bitswap<8>(rom[i] ^ 0xa0, 5, 6, 7, 4, 3, 2, 1, 0); break;
case 0x1010: rom[i] = bitswap<8>(rom[i] ^ 0x88, 7, 6, 3, 4, 5, 2, 1, 0); break;
case 0x1011: rom[i] = bitswap<8>(rom[i] ^ 0x88, 7, 6, 3, 4, 5, 2, 1, 0); break;
case 0x1100: rom[i] = bitswap<8>(rom[i] ^ 0x20, 7, 6, 3, 4, 5, 2, 1, 0); break;
case 0x1101: rom[i] = bitswap<8>(rom[i] ^ 0x88, 3, 6, 7, 4, 5, 2, 1, 0); break;
case 0x1110: rom[i] = bitswap<8>(rom[i] ^ 0x88, 7, 6, 3, 4, 5, 2, 1, 0); break;
case 0x1111: rom[i] = bitswap<8>(rom[i] ^ 0x88, 3, 6, 7, 4, 5, 2, 1, 0); break;
}
}
}